Well, back on subject, I got the new style of cards with my Killjoy model. It's of the same plastic-like construction as the retro deck, just a different texture (retro deck-pebble finish, stat card-linen finish). Either way, I like the construction, as they seem to be sturdier and more crease-resistant, like many standard plastic playing card decks available today.
I love using the retro deck, and have no problems with the finish.
I never mark on my cards themselves, and always put them in sleeves, to keep them in pristine condition.
I think Wyrd made a good decision with the choice they made.